I just looked at the motherboard on Newegg for reviews and saw that it is one crappy motherboard (31% 1/5 reviews, that's pretty bad). From what I read there, I doubt it's the graphics card causing the problems. I doubt it's even heat issues, rather an unstable motherboard.

Does this sound like your situation?:

Quote

...Second: Once I finally get the computer on and working properly, it randomly crashes. The display freezes or goes black, and I have to restart the computer (running into the reboot loop while i do).Third: After going to sleep mode, several issues arise, from either the keyboard not working to the display not working...

Hey there,in my rig, i have three XFX 5870s on a MSI P7N Diamond. Running fine for three weeks now. But I have to admit, it's inside an old bigtower case with a couple of fans in the side panel and a 120mm fan in the Front thats blowing out hot air. Board is 100% stable though.

In my work PC, I recently had problems with my mainboard too. My 5 year old Intel DG956WH became unstable and finally broke, i think the northbridge heated up to much by the single 5870 directly beneath it. Now I bought a cheap Asrock P5B-DE, because I just got my Q6600 Intel quadcore some weeks ago, and didnt wanna go all the way to buy new processor, DDR3 memory and so on.... As a precaution I although installed two 120mm fans in the case. Hope the board will last another 5 years now

I used to have a case with 2xIN 2xOUT (all were 80cm) - didn't work.Now i have 1xIN 1xOUT (all 120cm) + open the side panel and put a big house fan at max speed blowing in air - doesn't work.I think the MB is not designed to work at high temp (even though my mb is at ~42-44C).